Transmitter for teleselectors.



E. BLOS.

TRANSMITTER FOR TBLESBLEOTOBS.

APPLIUATION FILED s311127. 1909.

E. ELOS.

TRANSMITTER IDR TELESELECTORS.

APPLIUATION TILED SBPT.Q'I,1Q0Q.

970,367, Patented Sept. 13, 1910.

[l SHEETS-EHEET 2.

LVA

EnNs'r mios, or soHNEBERG, NEAR, BERLIN, GERMANY.

TRANSMITTER FOR TELESELECTORS.

Specification of Letters Patent. Patented Sept. 13, 1911).

Application filed September 27, 1909. Serial No. 519,706.

To all whom 'it mayy concern:

Be it known that I, ERNST BLos, of 10 Knigsweg, Schneberg, Germany, engineer,

a citizen of the German Empire, have 1nveiited certain new and useful `Improvements in Transmitters for Teleselectoi" of which the followii-ig is a specification.

This invention relates to transmitters 1o teleselectors.

.lt is the special object of my invention to produce a new ar 'angement of the transmitting station, which allows of the reduction ot the number of the transmitting contacts to a minimum, independent ofI the objects to be selected whereby new effects of a high connnerci-al usefulness are obtained.

T he novel transmitter for te-leselectors is particularly well ada ted for use in auto- .matic telephone exc langes. 1*`urtliermore the princiliilc of variation has been einbodied in the novel device by virtue of the simple arrangement of the sender or transmitting station and other novel 'features have been introduced, all as will be fully described hereinafter with reference to the accompanying drawing in which:

` Figure 1 represents in diagrammatic form a tele-selector embodying in desirable form the preseml improvements, a device being shown using two kinds of current impulses; and- Fig. 2 is a similar view of a teleselector using three kinds ot' current impulses.

Similar characters of reference denote like parts in' both the figures.

. The novel transmitter for teleselectors relates to that type which allow of selecting, by means of combination of different current impulses, any desired object out of any number of numbered objects from a distance.- y

For, numbering tlie objects of selection, a system of numbers having any desired basis may be employed, for instance a basis 8 or 1C` as powers of 2, or 9 or 27 as powers of 3. Since the existing system of numbers does not contain more than 10 numerals, namely, 0 9, it is not advisable to go beyond the basis 10 in composing the numbers required in carrying out this invention. But, if a basis smaller than 10 is chosen, then one or more numerals .nust be dispensed with. For instance, in the case of the basis 9, it is advisable to dispense with all the numbers containing the numeral 0. Similarly with the basis 8, all numbers containing one of the numerals 0 and 9 should be dispensed with.

In carrying out the present invention it is sufficient to provide, at the transmitting station, laccording to the base of numbers chosen, only eight, nine, tei-i, sixteen or twenty-seven groups or series of contacts.

These groips are numbered 1 to 8, or l to 9, or O to 9, etc., as the case maybe, and they are broughtlinto operation alternately and niccessively according to the number of the selected object. Each of these groups of con- 'tacts has ap ortioned to it, a determined current signa by means of which magnets are energized atthe receiving station, for the purpose ot making circuits for the objects of selection.` If these current signals are to be produced each by means of a single current impulse, this will require the provision, at. the receiving station, of complicated devices which are uncertain in work ing. Thus, for instance. for the basis 10, ten resistance bridges will have to be connected in parallel to a line, and relays in scrted in their branches which lose their current when impulses of certain strengths are sent, and thereby close local circuits.

ln order to avoid the deficiencies attendant on the above arrangement, the current signals are produced, according to the pres ent invention, by combining a few kinds of current impulses. Generally, only tivo kinds of current impulses are available at the transniittinr station, such as for instance positive an( negative impulses, or long and short impulses, or in the case of a double line, impulses produced by the earthing of each of these lilies. In this case, for example 231-8 current signals can be produced b y composing each signal of three current impulses. It is possible to produce also a third kind of current impulses, namely, by cai-thing simultaneously the single leads ot a double line, so that with only two current impulses per signal, nine current signals can be formed. These last mentioned current impulses, produced by earthing simultaneously theI sin fle leads of a double. line, may preferably e called double or multiple Acurrent impulses, in contradistinction to a simple impulse produced by eartliing but one of the leads of such line. Ii", in accordanbe with the ordinary existing base 10, it is desired to have ten current signals composed `of two or three kinds of current impulses four or three current im iulses must be einloyed for each signal. hen, of the possi le number (2 or 3) of variations, six oi`\ iro eraser.

, hereinafter-,only two `lainds o current arey available at the vtransniitting station, and

these are to be produced hy means oan aline 'and a hline.

i The current impulses which are transmitted hy operating successively the eight rows of contacts'o the transmitter may "follow on one another in the following series of varia tion: 2n No. lita c ci No. :u o lilo. tre a lilo. eis-e t No. 5:60a a lilo. 55:5 a: b

No. =h E a No; @zo o i; that to say, by operating successively the 'contacts'. of the row i the line La, La, L; 'Will so heecrthed insuccession, and. by operating 'the series Y the lines Lb, Lb, La will be suceessively earthed, and so on, y 'in order to estahlish the circuits of the 'selector et the receiving station, ilse is made a5 rof the arran ement of a local batter circuit ibranching o in succession at severa points. But the improved transmitting apparatus ymay alsocomprise selectors constructed on another principle, so long as such selectors io can be operated by combinations of current impulses of different character. A The branching ed' of the circuits takes place lthrough switches Sl, S2, S3, or through their stationary and working contacts as shown in Fig. l. The two positions of the switches are controlled byqthe rest and wbrking positions of magnet armatures. Each switch does notJ require a separate magisch and, in fact, all the switches of one .5o vertical seriesmay be coupled together and operated by a single magnet.

The objects to .e signall lamps `which are numbered from l-l8, 2i-28, etc., up to ESL-88. The rcason why a commencement is made with l1,

will be clear from the following citplanaf` tion: The contacts in series lll are marked 1",-8 and to each contact there corresponds a determined position of the series of 66 switches l to lil. For instance, to the contact It, there correspond the positions: rest position ofi, operating position of il. and operating position ollll. To each oi 'the contacts there are connected eight @5 .contacts 'lil-i, i'or instance to the contact l contacts of Vl. For lam selected are preferably the contacts 11-18.. To these eight contacts there correspond again determined positions of Athe series of switches IV, Se S15,V,S16 S31,Vl,S32 Sw, F ig. 1. These are the same combinations of positions asfor the contacts of 1H; for instance, foi-,the 'contacts la of VI the positions: rest position. of IV, operating position of V, and operating position of Vl. These firsteight contacts of Vl are given first the numeral 1, because they are all connected to contact l of Ill, and further, the ,numerals l to 8 for characterizing their positions in the-first group of eight. This gives the numbers l1, 12, 13-18- Then for lamp No. 14e for example, the following posi tions are required :-a, a, a, a, b, Z1, corresponding to the above table of series of variations. Analogously, the next eight contacts of Vl are marked 2l, 22, 23-28 because they are all connected to contact 2* of Hl. in this case also, the same combinations of positions of the series of switches lV, V, Vi are repeated as in the case of the -lrst contact and of the contacts of series III. The Same applies to all following groups of No. 4e for instance, the combinations o 'positions a, Z1, a, b, b, are necessary. The energization oi the magnets mi to .mx/1, as they correspond to the several combinations of positions, is ,produced by the connections shown in Fig. l by means of the battery B2, the relays ra and rb, and the switching-on magnet mi with the respective switchingwheel, contact disk, and the switch arm /c fixedto the switching wheel, the arrangement being such that the magnets remain unenergizcd when the relay ra operates, and current impulses of the character/e are transmitted by carthing the line La.. But, the magnets are energized lwhen current impulses of the character L are produced by earthing the line Lb. l To the a-position of "a series of 'switches there corresponds therefore an a-current impulse, and to the position there correspends a b-current impulse. Consequently tor lamp 44, for instance, there the current impulse cz, L, Z, a, b, I), must be transmitted.

rihe arrangement of the switching magnets mi mv, is such that the armature of the magnet if once attracted by the magnet, remains in this active position till it is returned to the position of rest which, for instance, can be done by hand. purpose there is indicated an` elastic hook at-the rightend of every magnet armature, Vwhich keeps the armature in the lower position if once it has been attracted by the magnet. F or restoring the armatures to their osition of rest, there is arranged a bar W lich crosses all thenmgnct armatures, and which .assesses noses opposite to cach armature. gf, then, the har is pushed, its

noses sctuate at the same time all the arma- 4 or this.'

tures of the shifting-magnets m1 mw which restablishes the position of rest for all arts. The subsequent actuation of the y shi ting ma nets mi 'mm has effected the Therefore if an earthed contact c be moved Il to II.

i allong'this row, the current impulses a, b, b,

will be transmitted in succession to the reeeiving station. 4

The ath of the current in selecting the lamp o. 44 will now be described more in detail. The contact of the earthed contact piece c with the first contact of the contact series 4.1, produces a current im ulse through Lb, rb, and B, to earth. Then y energizing rb a circuit is closed from B, through the armature of rb to the switching magnet im. The hook fixed to the armature rubs up along the teethof the yswitching wheel without moving the switching wheel With it, and without moving the switching arm 7c from its position on I1. The magnet om is also not energized, because its current circuit through the armature is open in front of rb. 0n the cessation of the current imulse, as the armature of the magnet mf descends, the switchiiw arm is moved from The next iiillowing current impulse b now causes an energization of rb, and thus closes. a circuit from B2 through mf, m11 and th'e ,armature of rb, whereby the armature of mi, and With it the switches S2 and S3, are moved into the operative po- StiQn. On the cessation of the current impulse, the switch arm is moved along into the position HP. The next following cui'- rent impulse b then energizes mm in a similar manner. These three current impulses,

-and their ei'eets, arerepeated when a contact piece is moved again over the current se- `ries 4 o' the transmitter, so that. finally the eombinationof positions e, L, l, a, l), l), coi'- responding to lamp No. 44, is produced by the energizat'ion of the magnets m11-, mm, mv, mw.' Flg. 1 shows clearly that in these positionsuthe circuit is not closed for any other lamp except the lamp No. 44. The lamp 44 is fed by the battery B,l until thc armatures of the magnets mb mv, are restored by ushing the returning har p. Similarly to amp 44, for lamp 73, for example, it will be necessary to move the -contact piece over the contact series 7 andi in succession, so as to producethe current impulses Zi, l), a, a, b, a, which energize the magnets mb, mn, my

-magnets im, will 'the conduit Lb.

and thus produce the combinations of positions b, b, (l, a, l), a, of the seriesof switches which arc necessary for the lam No. 73. The formation of any other circuits is also excluded with this combination.

, Fig. 2 shows, in a diagrammatic illustration, an arrangement according to which, bcsides the above discussed current impulses a and b, still ua third kind of impulse c is produced hy earthing simultaneously La and Lb without allowing the relays rb and `rb to act, for which purpose any suitable means may bc employed, for instance that shown in I Fig. 2. rlhen, with only two current iinpulses foreach numeral oi thc transmitter, the following variations can be produced z No.1:ac No.4: ba No.7: crt No.2zcblNo.5zlib No.8:cb No. 3: ac No. (i: b c No. S): c c

Similarly, the transmitter comprises iiinc serles of contacts, each series having` two contacts, which are connected according to lthese series of variations t-o the lilies Lb `and Lb, and each switch S1, S2, Sn has threc positions which are controlled by additional the upper armatures of which are actuated hyearth-connection of This actuation brings the dependent three-plug switches into their medium position. The earth-connection of conduits Lb and Lb actuatcs at the same time both magnets m and in," which results in the lowest. position of the magnet armature, and likewise the lowest position of the dependent three-plug-switches. Earth connection of conduit Lb aetuatcs none of thc magnets mb, m1, and in consequence the magnet armatures, and the dependent tliree-plugsswitches, remain in their upper position of rest. The forwarding magnet mb is included in a circuit with battery BL, in such' a way that this magnet is actuated as often as earth-connection is made by Lb. Since each of the thrcc'contacts ot the first switch has connected to it a switch having thrcc contacts, there are now nine contacts, 1-$l iii row ll. lf now two turlhcivertical rows are added, then over each contact of Il there will pass iiinc contacts of lV and the row Il containing nine contacts, thc iow IV will contain SlXtlrSl contacts in the whole.

lf all the contacts of lV arc divided into groups of nine contacts cach, they may be marked with the numbers ll-lf), 21 29, up

ioo

lo 9199. Each numeral or digit ot' these.`

numbers corresponds in turn to a determined combination of positions of the series of switcheskthis combination heilig produced by moving a contact. piece c over that series of contacts of the transmitter that has a similar numeral. It therefore, for instance, thc lamp 18 is to he lighted, thcn by running with the caith-connecting contact-plug over the contact columns of row 1, and thereupon ot' row 8,A earth-connection is made. first to the line La and again to line La, then to the lines L,l anid Lb at the same time, then to the `line Lb alone. Ear-thing ot' the line L, energizes the relay ra. Both armatures are at.- tracted and close their working contacts. The closing of the lower contact is ineffective, but over the upper contact the forwarding magnet '1n-f is energized. Consequently the switch S1 remains in its upper position. Y

On the cessation of the earthing the switch arm k, is moved to the position Il?, as already explained with relation to Fig, 1.

`This operation is repeated when the contact -both upper armatures being rigidly coupled.

In consequence of this, current tiowsy from .the battery 13 over the lworking contacts ot' the 'lower armatures, and the switch arm 7c, which is in the position l'lll1,`to the magnets nem, mm and the forwarding magnet im.

Therefore, the'switches of lll get into their lowest position, and arm 7c, is forwarded to the position lVl after earthing having ceased. The now following earthing of Lb energizes rb, and therefore closes the working contact of its upper armature, whereby a circuit yis closed to mw and mf. switches'Slv'consequently reach their medium position, and the switch arm 7c, steps forward to its initial position. Now, the circuit of the 'lamp 18 indeed, as Fig. 2 shows, is closed. 'lhe lamp lights until the armatures of the magnets nz/1, m1 ctc., are restored by pushing the restoringr bar pp .It is obvious that the number ot' series of switches, and therefore the number-of lamps capable of being selected, can be increased as desired. Alu important feature is that the transmitter doesl notrcquire to be altered for this' purpose, because with the peculiar numberingot the objects oi selection there are always only eight or nine variations of currentimpulses which are produced by the series of contacts ot' the same transmitter. lt for example it is desired to add to the above lescribed apparatus ot' liig. 1, three more'rows of switches, then the numbering will begin,

preferably with 111 and will end-With 888,

leaving out all numbers that contain one of the numerals 0 and 9. Then, for example, if it is required to select lamp No. 581, the contact .piece is moved over the series otcon.

tacts 5., 8, 41, at the transmitting station in Succession. It is theretorc not necessary to The nected with one or thel other or smeer ing of the lamps or subscribers may be advantageously as follows: 111 119, 121 129,131. .139;211 '...219,221 .229, Q31 Q39, and so on to 991 999. In the same wayv a still further increase of subscribers in the whole system can be provided, wit-hout altering the sender devices, by a mere alteration of the selecting organs in the station.

ln order to realize the progress in the art made by the present invention, it must be borne in mind that each combination of current impulses must not necessarily be transmitted as a whole; but each of these combinations may be regarded as consisting of a restricted number of simple base variations Which can be transmitted one after the other successively without interfering thereby with the special arrangementof the receiver, the only necessity consisting in a proper numbering of the objects of selection. l claim as my invention: i

soy

1. ln an apparatus for electrically transmitting signals byy separate current impulses, thc combination with the signals to be operated, and electrical controlling mechanism therefor, of a transmitter comprising a divided local starting circuitfor said con'- trolling mechanism, a relay ma et in each branch thereof, a plurality o groupsof fixed contacts in the starting circuit, the contacts of the several groups being conboth branches of the'starting circuit to produce a different succession of impulses for each group ot contacts, and a movable contact element connected in said circuit and arranged to suecessively'engage the fixed contacts 'of any lgroupv upon manual operation thereof.

2. In an apparatus for electrically transmitting signals by separate current im-` pulses, the combination with .the signalsto.`

'the starting circuit, anda movable'. earthed contact. element arrangedto successively enf gage the fixed contactsfpfany grou '.the contaetsot each group being errang 1n a row and the number of auch contacts correspondingto the number ofcurrent impulses los lltv

y f ei'uii-eci to timsmit digit of the siig. In wit's whereof have ile-reuni Setna s number, the several contacts of the reA my hund in the presence of two witnesses.

spectivegroups being also connected with one or the other or both branches of the ERNSI BLOb 5 starting circuit to produce a different suc- Witnesses:

'cession of impulses for each group of con- VOLDEMAR HAUPT,

tacts. u HENRY HASPER. 

